What the dealer route involves
Dealers often require the vehicle on site, which means towing if no key is available, and may need to order the key. That can take days.
What a mobile locksmith can do
With the right equipment, many transponder keys, remote-head keys, and proximity fobs can be cut and programmed in your driveway or parking lot.
What you need ready
Have your vehicle year, make, model, VIN, and proof of ownership with matching ID. This is required before any key is made.
Get a spare while you are at it
Programming a second key during the same visit usually costs far less than a future all-keys-lost replacement.